In light of the recent ETS discussion (see here & here), this is an interesting quote from one of Wright's early books:
"Christian obedience is not done in order to earn favor with God; nothing we can do, not even our faith or our sincerity, can earn that favor. It is God’s gracious gift. It was the Pharisees who thought that they could earn God’s favor by good deeds. When we struggle to obey God, we are not doing it because we are trying to earn anything but because God has already accepted us, and so – as forgiven children of a loving father… – we begin to want to obey him."
--N.T. Wright - Small Faith Great God, 99 (originally written in 78').